Event
- Event ID
- 816
- Quality
- Description
- In a chemical plant , a process gas leak (4% ammonia and 88% hydrogen) occurs during a purge operation. The cloud of gas ignites and explodes. An employee is killed.
- Event Initiating system
- Classification of the physical effects
- Hydrogen Release and Ignition
- Nature of the consequences
- Macro-region
- Asia
- Country
- Japan
- Date
- Main component involved?
- Pipe
- Initiating cause
- Inadequate Or No Purge
- Root causes
- Unknown (No additional details provided)
- Root CAUSE analysis
- The INITIATING CAUSE is the leak and ignition of a 4% ammonia - 88% hydrogen mixture
The ROOT CAUSE is unknown.
Facility
- Application
- Chemical Industry
- Sub-application
- Ammonia production
- Hydrogen supply chain stage
- All components affected
- proces gas line
- Location type
- Open
- Location description
- Industrial Area
- Operational condition
- Pre-event occurrences
- The accident occurred during a purge operation.
Emergency & Consequences
- Number of injured persons
- 0
- Number of fatalities
- 1
- Post-event summary
- An employee is killed.
Event Nature
- Release type
- gas mixture
- Involved substances (% vol)
H2 88%
NH3 4%- Presumed ignition source
- Not reported
References
- Reference & weblink
ARIA data base <br />
https://www.aria.developpement-durable.gouv.fr/accident/5356/<br />
(accessed December 2025)
JRC assessment
- Sources categories
- ARIA
